No. 635: DNA is actually really inefficient when you think about it

T-Rex: I'm upgrading to my latest operating system.
T-Rex: It's 64-bit!
T-Rex: The only problem is large parts of my old 4-bit DNA are no longer compatible. The developers just never updated them.
T-Rex: Like my great grandad, who evolved upright locomotion.
Utahraptor: Why wouldn't they make it all backwards compatible?
T-Rex: You're thinking of my Uncle Louie. He evolved walking backwards.
T-Rex: Fell of a cliff.
T-Rex: Left no descendants.